php不使用插件导出excel的简单方法

$filename=date("Y年m月d日")."数据信息统计结果.xls"; //文件名
$ua = $_SERVER["HTTP_USER_AGENT"];　　　　　　 //中文文件名不乱码
if (preg_match("/MSIE/",$ua)) {
$filename=urlencode($filename);
} else if (preg_match("/Firefox/",$ua)) {
$filename=$filename;
} else {
$filename=urlencode($filename);
}
header("Content-type:application/vnd.ms-excel");　　　//输出excel头
header("Content-Disposition:filename=".$filename);
$n = iconv('utf-8','gbk','11');　　　　　　　//设置excel表格列
$t = iconv('utf-8','22');
$k = iconv('utf-8','33');
$s = iconv('utf-8','44');
$r= iconv('utf-8','55');
$a= iconv('utf-8','66');

echo "{$n}t";
echo "{$t}t";
echo "{$k}t";
echo "{$s}t";
echo "{$r}t";
echo "{$a}tn";

　　　　　　
foreach($a as $kk=>$pp){　　　　　　　　　　//对每列些数据
foreach($pp['child'] as $k=>$p){
echo iconv("utf-8","gbk//IGNORE",$pp['u']."t");
echo iconv("utf-8",$p['u']."t");
echo iconv("utf-8",$p['s']."t");
echo iconv("utf-8",$p['t']."t");
echo iconv("utf-8",$p['c']."t");
echo iconv("utf-8",$p['t']."tn");
}
}

Array
(
[0] => Array
(
[unitid] => 1234
[u] => aaa
[fid] => 1000
[shengid] => 1000
[shiid] => 0
[xianid] => 0
[rid] => 2
[orders] => 50
[sys_createuid] => 1
[sys_createtime] => 1383556976
[sys_updateuid] => 1
[sys_updatetime] => 1389853763
[child] => Array
(
[0] => Array
(
[unitid] => 1035
[u] => bbb
[fid] => 1000
[shengid] => 1000
[shiid] => 0
[xianid] => 0
[rid] => 2
[orders] => 50
[sys_createuid] => 1
[sys_createtime] => 1383556976
[sys_updateuid] => 1
[sys_updatetime] => 1389853763
[funitname] =>
[s] => 6
[t] => 1
[c] => 1
[t] => 2
)
[4] => Array
(
[u] => 合计
[s] => 8
[t] => 1
[c] => 3
[t] => 3
))))